BIOLOGY: REVIEWER

REVIEWER
BIOLOGY PART 1
NAME:______________________________ Date:______________ Score:______________

I. Match the description in column B with the terms in column A. Write only the letter of the correct answer.
A. B.
___1. Genetics a. the weaker of a pair of trait
___2. Dominant trait b. a level in a succession of a family
___3. Genes c. the science that studies the process of
___4. Generation heredity
___5. Pure d. the passing of traits from parent to offspring
___6. Recessive trait e. when the paired genes for a trait are
___7. Hybrid identical
___8. Heredity f. the stronger of a pair of traits
___9. Genotype g. structures of chromosomes that determine
___10. Phenotype hereditary traits
h. the appearance of an organism that results from its gene action
i. when the paired of genes for a trait are different
j. the actual heredity makeup of an organism

II. Complete the Punnet Square for each of the following crosses:
TT x tt , tt x Tt Next to the squares, give the fractions of the two possible phenotypes.













III. Brown eyes (B) are dominant over blue (b) eyes from several possible crosses below.

1. BBxbb 3. BBxBb









2. Bbxbb 4. BBxBB









5. BBxBb









a. Find the crosses which could produce a blue-eyed child?
b. In the theory, can two blue-eyed parents have a brown-eyed child? Why or why not?


IV. Write True if the statement is correct; False if it is wrong.
_____1. A color-blind daughter can have a normal mother.
_____2. A normal daughter can have a color-blind father.
_____3. A woman can be bald even with one recessive gene.
_____4. Incomplete dominance will result in three phenotype in the offspring generation if a blend of two traits for every parent is present.
_____5. A parent with genes for having dimples will always have a child with dimples.
_____6. A color-blind son can have a normal father.
_____7. A mongoloid is capable of reproducing.
_____8. The phenotype is always the same as the genotype.
_____9. A person with klinefelter’s syndrome has more male characteristics.
_____10. A color-blind will always have another color-blind brother.

V. Choose the letter of the best answer to complete each statement.
1. Identical twins have many characteristics mainly because they;
a. Develop from two eggs which contained the same number of chromosomes.
b. Were exposed to the same parental environment.
c. Represent two individuals born at the same time of the same parents.
d. Arose from the same fertilized egg.
2. An individual with group AB blood marries an individual with group O blood. Their offspring can be
a. Either group AB or group O
b. Either group A or group B
c. Either group A or group O
d. Group A,B,AB,or O
3. A certain human produced 444 mature eggs throughout her lifetime. How many eggs were probably alike with regard to genotype?
a. None
b. 111
c. 222
d. 444
4. Which of the following crosses would probably yield some completely homozygous recessive offspring?
a. Ttrr xTTrr
b. TtRrxttRR
c. ttRRxTTrr
d. TtRrxttRr
5. In the cross Aa x Aa, hat portion of the offspring will have the same genotype as the parents?
a. One-half
b. One-fourth
c. Three-fourths
d. All